I forgot to ask, is there a known good source of replacement tag ram for U8 and U9?

Thanks Frank. Being in Australia, Best is a daunting thought. I noticed Arne has some and there is always the funky adapter option too. I need to get some bits and pieces from the Exxos store anyway.

Its always exciting to get new projects. Until they pile up. Looking forward to seeing how you go.

I've been dabbling with this on and off in between (a lot of) other projects and narrowed all the issues down. A mate gave me a few bits and bobs from his Atari horde last year. Amongst them were some MegaSTE spares. I happened upon a post from Frank where mentions cache issues. I replaced U3 and U4...

I know the feeling........ work is the curse of the serial hobbyist.

Cool. I will check that out. I'm part way through a ATX build atm and have been a bit sidetracked by a 2600jr build. Better get cracking before this comes to fruition.

If I had the time that was close to top of the wish list. Brilliant.

RTC might be a pretty important feature too. I think Kodak80 did design a PCB for the ATX board that might work too.

Well done, beat me to it. I asked him if there was at least one good top and bottom. I'm keen so LMK once you are done.

That kind of talk isn't helping, mate.

I spotted these too, I don't have a 400 so it is bloody tempting. But, I have a few projects on the cook atm so sitting on the fence. If anyone in Victoria wants to split it, LMK.